Tool for reconditioning valves



Feb. 8, 1949. J. w. JACKSON 7 7 2,460,985

TOOL FOR RECONDITIONING VALVES Filed Nov. 25, 1945 2 Sheets-Sheet "1 15-40. 49 M 16 II 48 12 i UTIL BZTITOT Jmes w Jackson Feb. 8, 1949. JACKSON v 2,460,985

TOOL FOR .RECONDITIONING VALVES Filed Nov. 23, 1945 2 Sheets- Sheet 2 VWMZKM Patented Feb. 8, 1949 N TE? TOOL ron RECONDITIONINGVVALVIVES Jameswellman Jackson, Toronto, Ontario, Canada Application November 23, 1945, Serial llo. 630,475

The invention relates for reconditioning-the seatsfof valves and for turning down the seat portion of a valve when it is necessary to apply an insert to provide a new seat on account of theoriginal one having become worn down beyond repair. c

The primary object of the invention is to pro vide a tool which isadapted to be used without having to remove the valve from the line in which it is connnected. j I

7 Another object of .the'invention is the provision of a portable tool designed'to'be mounted in the body oi a valve and c'perated' with facility in order to'recondition the seat thereof.

Another "object is to provide a 'tool ofjthis character by which a damaged orworn valveseat can be accurately faced 011 with a cutt'er'to furnish a fresh and true seating surface.

The invention particularly concerns valves of the kind employed in'industrial and analogous installations such as those of the globe and angle types; The tool however, is adapted to condition any flatfseat of a valveof a size'forwhich. it is made and to provides; seat which is as'accurate asthat which can be formed on a lathe.

Thetool comprehendsa cutter which'is sup;

plied with "means bywhich a cut of a regulable depth, can'be made, andthetool is so de'vised' that the operation of reconditioning avalv'e-seat can be performed expeditiously. An advantageous feature of construction is that thetoolmay be removed at any stage of the operation in order to inspect the work'and can be returned. to exact position for continuing the operation. v

The invention presents asturdyand efficient tool which can be manufactured at low cost, and one'which saves time and labour in conditioning a valve-seat.

While the major objects and advantages ofthe invention have been related, subsidiary objects and advantages will appear from tha -ensuing specification of the selected form of the invention which is illustrated in the accompanying drawings. g I In the drawings, Figlis aplan view-ofthe tool. Fig. 2 is a side view thereof .showing it' applied to the body of a globe valve for operatinglon the flat seat thereof. a

Fig. 3. is .a similar view the tool-in.section.g. -..t 1

Fig. 4 is across sectionon line 4-. of Fig. 3:. Fig. 5 is a perspective view of a ring bearing. I Fig. 6 'isa perspective-view of the cuttercgand .the holdertherefor.

to improvements intools to rig. abut showing 5'Claims. (01. 90-125 Fig. 7 is a perspective view of a gear forming a part'ofthe feed mechanismior the cutter.

Fig. 8 is a perspective view of the bottom end of the tool body in which the holderis'slid'ably mounted.

Fig. 9 is a detail'of a guide ring which loosely encircles the lower end'of the body. c Fig. 10 is a detail or a retainer forthe guide.

Fig. 11 is a vertical section of the tool showi n'g a thimble in raised position. c

In order to illustrate the manner of using the tool ofthe present invention, there is shown at 'I 2,a"standard valve body which is provided'with a flat seat, denoted at l3, surroundingthe' port or-duct 'l l.' In certain makes of such-valves the stem assembly is secured by a nut- I B'having screw-threaded engagement with said body. In

carrying out the invention: this nut may be used 1 to fasten the tool while the same is being used; as will-be'explained in greater detail.

I The'tool comprises an elongated body 16 preferably of a circular shape in cross section'and supplied with a central aperture in which is mounted a spindle I1. The spindle projects upwardly of the body lfi and is provided with an integral collar [8 shouldered at its lower side against the face of the upper-end l9 ofthe body.

The upper side of said collar is shouldered by a locking nut 20 screwed 'on said upperend IQ. Desirably a thrust washer 2l is interposed between the collar l8 andthe-nut' 20 in ordrto minimize wear due to upward thrust on the spin dle. The collar precludes endwise movement 'of the spindle which is free to turn in said body when actuatedby a'thimble 22. 1

The body 16 is enlarged at its lowerfend'as at 23 andthis enlargement is "supplied with a transverse aperture 24"-at" right angles to the spindle-axis, which is circular in cross section nd slidably contains a- -h'older' '25 'of a similar cross section. The enlargement is of a slightly less diameter than the opening [4 in the valve-seat I I3so as to project loosely thereinwhen theitool is'inserted in the valve-body I2. J

The holder 25 'is' held against rotation about its axis by means of a longitudinal slot ZS'there in engaged by'a screw 21 or analogous meansduced diameter and threaded externally and on this section is threadedly mounted atoothed wheel of the bevel-gear type indicated at 33. This toothed wheel is in constant mesh with peripheral teeth 34 formed on the lower end of the spindle H which constitute therewith a right-angle drive for cross feed of the cutter and its holder. This gearing is operated; by rotation of said spindle and it will be understood that rotation of the spindle in one .direc tion will feed the cutter outwardly and that reverse rotation will feed it inwardly. The gearag 33 is located in a rearenlargement of the aperture Y2 and in this enlargement a cylindrical bushing 35 is fitted by means of screw threads. The inner end of the bushing forms a thrust shoulder .for the gear 33. I

Below the holder there is provided a guide ring 36 which is made a slip fit in the duct M of the valve for centering the lower end of the body iii-therein and assuring of a true cutting operation across the face of the seat. The guide ring is a brass member rotatably relative to the 'body it and seated in an annular groove 37 formed on the lower end 23 thereof. Y The groove is composedin part by a reduction in the diameter of said end 23 and in 'part'by a retaining washer 38 attached by ordinary fastenings-means including screws as at '39 and dowels 40. Preferably the bushing is locked by the provision ofa flat 4i thereon engaged by the guide ring 36--see Fig. 8.

Adverting to the thimble 22, this is j connected to the spindle I1 and-devised to secure it in a, set position to which it may be rotated. The connecting means consists of a pin 42 trans- V yersely extending through the spindle ;and

loosely engaged in an axially directed slot 43 formed in the thimble, which thimble being knurled or milled so that it may be gripped firmly by hand and turned. This means of connection enables the thimble to be raised onthe spindle against the pressure exerted by a compression spring-44. The thimble is normally locked to the body It by means of pins 45 projecting upwardly from the nut 20 and loosely engaged in, holes 46 provided in the inner face 41 of the thimbleas best discernible in Fig. 11.

.50 having aninclined bottom face'5l which rests on thexbeveled end face of said-part '49 and therebyaligns the, tool with the valve axis. In the case of repair of a valve whichiissupplied with the nut 15, referred to earlier in'the specification, the adapter 'is secured by this nut while the tool :is being used, otherwise a'special nut is employed.

The adapter is internally threaded to engage To unlock the z spindle so that it may be rotated to v feed the an externally-threaded ring bearing 52 by which the tool is fed longitudinally of its axis for setting the depth of cut. The ring bearing is rotatably mounted on the body It and shouldered against endwise movement. To this end the body is supplied with a bearing surface preferably furnished by a bushing 53 rigid thereon. A flange 54 integral with the body provides a shoulder at the lower side .of the ring bearing and a detachable collar 55 on the'body provides a shoulder at the upper side of the ring bearing which is desirably recessed to receive said flange and collar.

A lever 56'having a handle 51 serves as a crank for-turning the body on the ring bearing. The leveris screw-threaded on the upper end I9 of the body to tighten against the collar 55 and the nut '20 locks it in place. Obviously other means could-be resorted to in order to attach said lever and if so desired a ratchet connection could be employed without departing from the invention.

The'ringibearing 52 is supplied with means by which it maybe locked to the adapter 48 in any position to which it is adjusted. To this end it is split as at 58 and the split portion isprovided with a hole having threaded engagement with .a headed screw 59 encircled by a collar 60 and adapted. on being tightened to expand the ring bearing to frictionall-y hold it stationary. To facilitate expansion the ring bearing may be slotted at intervals as at 6|.

In the use of the tool itis placed in the valve and supported by the adapter with the valve elevated from theseat thereof and with the guide ring 36 inserted in theiseat opening M. The ring bearing is turned .by hand to screw feed the body of the tool downwardly until thecutter contacts the face of the seat. The thimble is then raised and turned to withdraw the cutter clear of the seat, whereupon the ring bearing is again turned to feed the cutter below the seatface according to the depth of cut required. The ring bearing is made fast in its set position by the locking device 59 and the thimble isturned to feed the cutteroutwardly into engagement with the seat. On turning the-hand lever the cutter is rotated about the spindle axis to cut the seat. The seat is faced off by repeating the can be made of materials to resist wear and that all surfaces that require oiling can be amply lubricated toassure of smooth operation and long life.

-What I claim is: r

1. In a tool for reconditioning valve seats, an elongated body for insertion downwardly into a valve to the seat thereof, said body having an held against endwise movement in said aperture, said bevel gear having a bore threadedly engaged with said screw threads for feeding holder transversely of said body upon movement of said spindle, a cutting tool carried by said holder, and means for turning said body.

2. A tool as defined in claim 1, in which the said bevel gear is held in mesh by means of a cylindrical bushing encircling the said cylindrical section of the holder and screw threaded in the said aperture of the body.

3. A tool as defined in claim 1, in which the said cutting tool angularly projects from an end face of said holder and is secured by a. screw endwise extending through said holder and accessible at the end of the holder opposite said cutting tool whereby interference with the cutting edge of the tool is avoided.

4. A tool as defined in claim 1, in which the said spindle is manually rotatable by means of a thimble slidably keyed thereon for non-rotative engagement with the said body when moved in one direction, and in which said spindle is biased by a spring to retain said non-rotative engagement.

5. A tool as defined in claim 1, in which the said body is provided with means for supporting it on the valve comprising a ring bearing turnably seated in a recess provided in said rotatable body, an adapter ring threadedly engaged with said ring bearing and having an inclined seating face for engaging the valve body, and means for securing the adapter ring to the valve body.

JAMES WELLMAN JACKSON. 7

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,470,641 Pochila Oct. 16, 1923 1,532,653 Davison Apr. 7,1925 1,560,048 Fingerle Nov. 3, 1925 2,211,134 Kruell Aug. 13, 1940 2,283,323 Erhardt May 19, 1942 

